JP2001311772A - Fm-cw radar device - Google Patents
Fm-cw radar deviceInfo
- Publication number
- JP2001311772A JP2001311772A JP2000129768A JP2000129768A JP2001311772A JP 2001311772 A JP2001311772 A JP 2001311772A JP 2000129768 A JP2000129768 A JP 2000129768A JP 2000129768 A JP2000129768 A JP 2000129768A JP 2001311772 A JP2001311772 A JP 2001311772A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- noise level
- extracting
- output
- reference value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＦＭ−ＣＷ（Cont
inuous Wave）レーダ装置に関する。特に、構成要素で
ある高周波（ＲＦ）回路の障害を検知し得るＦＭ−ＣＷ
（Continuous Wave）レーダ装置に関する。[0001] The present invention relates to an FM-CW (Cont.
inuous Wave) radar device. In particular, FM-CW capable of detecting a failure of a high frequency (RF) circuit as a component
(Continuous Wave) A radar device.
【０００２】[0002]
【従来の技術】図１は、ＦＭ−ＣＷレーダ装置の高周波
部の概念構成を示すブロック図である。送信部１と受信
部２を有し、送信部１において、搬送波信号１０を三角
波である変調信号３により振幅変調し、これを逓倍器１
１によりｎ周波数逓倍する。逓倍された信号は、電力増
幅器１３により電力増幅されて、図示しない送信フィル
タを通り、アンテナ４から送出される。2. Description of the Related Art FIG. 1 is a block diagram showing a conceptual configuration of a high frequency section of an FM-CW radar device. It has a transmitting unit 1 and a receiving unit 2. In the transmitting unit 1, the carrier signal 10 is amplitude-modulated by a modulation signal 3 that is a triangular wave, and this is
The frequency is multiplied by n by 1. The multiplied signal is power-amplified by the power amplifier 13, passes through a transmission filter (not shown), and is transmitted from the antenna 4.
【０００３】さらに、送信部１には、分波器１２を有
し、送信部１から送出される信号の一部が分岐されて、
受信部２に入力される。Further, the transmitting section 1 has a demultiplexer 12, and a part of the signal transmitted from the transmitting section 1 is branched,
It is input to the receiving unit 2.
【０００４】一方、アンテナ５から、送信信号が対象物
により反射された反射信号を受信し、図示しない受信フ
ィルタを経由し、受信部２に受信入力される。On the other hand, a reflected signal of a transmission signal reflected by an object is received from an antenna 5 and is received and input to a reception unit 2 via a reception filter (not shown).
【０００５】そして、受信信号は、増幅器２０で増幅さ
れ、混合器（ミキサー）２１に入力される。したがっ
て、ミキサー２１では、先に説明した送信部１の分波器
１２から分岐された送信信号と受信反射信号との位相差
に対応したビート周波数信号が出力される。[0005] The received signal is amplified by an amplifier 20 and input to a mixer 21. Accordingly, the mixer 21 outputs a beat frequency signal corresponding to the phase difference between the transmission signal and the reception reflection signal branched from the splitter 12 of the transmission unit 1 described above.
【０００６】このビート周波数信号の大きさ（振幅レベ
ル）は、送信信号と受信反射信号との位相差に対応し、
従って、送信部１と反射対象物との距離に比例し、これ
により目的とする対象物との間の距離を測定することが
出来る。The magnitude (amplitude level) of the beat frequency signal corresponds to the phase difference between the transmission signal and the reception reflection signal,
Therefore, the distance between the transmitting unit 1 and the reflection target is proportional to the distance between the transmission unit 1 and the target target.
【０００７】ビート周波数信号は、更に分周器２２によ
りＩＦ周波数帯に周波数逓減されて受信部２から出力さ
れる。このＩＦ周波数帯に周波数逓減されたビート周波
数信号は図示しない回路により、距離に換算する信号を
生成するために利用される。The beat frequency signal is further frequency-down-converted to an IF frequency band by a frequency divider 22 and output from the receiver 2. The beat frequency signal whose frequency has been reduced to the IF frequency band is used by a circuit (not shown) to generate a signal to be converted into a distance.
【０００８】一方、ＦＭ−ＣＷレーダ装置は、車輌に搭
載される衝突防止装置に一つの応用として適用されてい
る。かかる場合、ＦＭ−ＣＷレーダ装置に故障が生じる
場合は、人命にもかかわる恐れがある。したがって、常
時ＦＭ−ＣＷレーダ装置の障害の有無を検知することが
重要である。[0008] On the other hand, the FM-CW radar device is applied as one application to a collision prevention device mounted on a vehicle. In such a case, if a failure occurs in the FM-CW radar device, there is a possibility that the FM-CW radar device may be fatal. Therefore, it is important to constantly detect the presence or absence of a failure in the FM-CW radar device.
【０００９】[0009]
【発明が解決しようとする課題】かかるＦＭ−ＣＷレー
ダ装置における障害の有無の検知のための従来技術とし
て例えば、特開平１１−５２０５２号公報に記載の技術
がある。ここに記載される技術は、ＦＭ−ＣＷレーダ装
置を構成するいずれかのユニットに故障が発生すると、
ミキサのＩＦ出力に振幅変調信号が現れないため、振幅
変調信号のレベルを検出することにより装置の故障を検
出するものである。As a conventional technique for detecting the presence or absence of a failure in such an FM-CW radar apparatus, there is a technique disclosed in Japanese Patent Application Laid-Open No. H11-52052, for example. The technology described here is based on the assumption that a failure occurs in any of the units that constitute the FM-CW radar device.
Since no amplitude modulation signal appears at the IF output of the mixer, the failure of the device is detected by detecting the level of the amplitude modulation signal.
【００１０】しかし、かかる従来の方法においては、振
幅変調キャリアのレベルにばらつきが大きく、基準値範
囲内で一定レベルに調整することが困難である。However, in such a conventional method, the level of the amplitude-modulated carrier varies greatly, and it is difficult to adjust the level to a constant level within the reference value range.
【００１１】したがって、本発明の目的は、かかる従来
の技術における問題を解決するＦＭ−ＣＷレーダ装置を
提供することにある。Accordingly, it is an object of the present invention to provide an FM-CW radar device which solves the problems in the conventional technology.
【００１２】[0012]
【課題を解決するための手段】本発明者等は、前記の従
来技術と全く技術思想を異にするもので、ミキサー２１
から出力するノイズレベルが、装置の高周波部の障害に
おいて変化すること、周波数に従ってノイズレベルが変
化する領域が送信部１に生じること及び周波数に寄らず
ノイズレベルに変化が無い領域が受信部２に生じること
の認識に基づき本発明の構成に至ったものである。The inventors of the present invention have a completely different technical idea from the above-mentioned prior art.
The noise level output from the device changes due to the failure of the high-frequency unit of the device, the region where the noise level changes according to the frequency is generated in the transmitting unit 1, and the region where the noise level does not change regardless of the frequency is the receiving unit 2. Based on the recognition that this occurs, the present invention has been made.
【００１３】そして、かかる本発明に従うＦＭ−ＣＷレ
ーダ装置の基本構成は、高周波部におけるノイズレベル
を抽出する回路と、前記ノイズレベルを抽出する回路の
出力を所定基準値と比較する比較回路を有し、この比較
回路が、前記ノイズレベルを抽出する回路の出力が前記
所定基準値より小さくなることを検出したアラーム信号
を出力するように構成されたことを特徴とする。The basic configuration of the FM-CW radar apparatus according to the present invention has a circuit for extracting a noise level in a high frequency section and a comparison circuit for comparing the output of the circuit for extracting the noise level with a predetermined reference value. The comparison circuit is configured to output an alarm signal that detects that the output of the circuit for extracting the noise level is smaller than the predetermined reference value.
【００１４】また、好ましい態様として、前記ノイズレ
ベルを抽出する回路は、前記高周波部における送信側の
ノイズレベルを抽出する第１の回路と、前記高周波部に
おける受信側のノイズレベルを抽出する第２の回路とを
有し、前記比較器は、前記第１の回路の出力と所定の第
１の基準値と比較する第１の比較回路と、前記第２の回
路の出力と所定の第２の基準値と比較する第２の比較回
路とを有することを特徴とする。In a preferred embodiment, the circuit for extracting the noise level includes a first circuit for extracting a noise level on the transmitting side in the high-frequency section and a second circuit for extracting a noise level on the receiving side in the high-frequency section. A comparator for comparing the output of the first circuit with a predetermined first reference value, and the output of the second circuit with a predetermined second reference value. And a second comparison circuit for comparing with a reference value.
【００１５】さらに好ましい態様として、前記ノイズレ
ベルを抽出する回路は、前記高周波部における送信側の
ノイズレベルを抽出する第１の回路と、前記高周波部に
おける受信側のノイズレベルを抽出する第２の回路とを
有し、前記比較器は、前記第１の回路の出力と前記第２
の回路の出力とを切り替えて入力し、対応する所定の第
１の基準値又は、第２の基準値と比較することを特徴と
する。In a further preferred aspect, the circuit for extracting the noise level includes a first circuit for extracting a noise level on the transmitting side in the high frequency section and a second circuit for extracting a noise level on the receiving side in the high frequency section. And a comparator, wherein the comparator includes an output of the first circuit and the second
The circuit is switched and input, and compared with a corresponding predetermined first reference value or second reference value.
【００１６】さらにまた、好ましい態様として、前記い
ずれかの態様において、前記送信側のノイズレベルを抽
出する第１の回路は、周波数に対応してノイズレベルが
変化する第１の周波数帯域の信号を通過するローパスフ
ィルタであり、前記受信側のノイズレベルを抽出する第
２の回路は、所定の帯域においてノイズレベルが変化し
ない第２の周波数帯域の信号を通過させるバンドパスフ
ィルタであることを特徴とする。Further, as a preferred mode, in any one of the above-mentioned modes, the first circuit for extracting the noise level on the transmission side converts a signal in a first frequency band whose noise level changes in response to a frequency. A low-pass filter that passes therethrough, wherein the second circuit that extracts the noise level on the receiving side is a band-pass filter that passes a signal in a second frequency band in which the noise level does not change in a predetermined band. I do.
【００１７】さらに、好ましい態様として、前記第１の
周波数帯域に対し、前記第２の周波数帯域は、高い周波
数側にあることを特徴とする。Further, as a preferred embodiment, the second frequency band is on the higher frequency side with respect to the first frequency band.
【００１８】本発明の更なる特徴は、以下の図面を参照
して説明される発明の実施の形態から明らかになる。Further features of the present invention will be apparent from embodiments of the present invention described with reference to the following drawings.
【００１９】[0019]
【発明の実施の形態】以下に図面に従い本発明の実施の
形態を説明する。なお、図において、同一又は類似のも
のには同一の参照番号又は、参照記号を付して説明す
る。Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or similar components will be described with the same reference numerals or reference symbols.
【００２０】図２は、上記した、ノイズレベルと周波数
領域の関係を説明する図である。横軸に周波数、縦軸に
ノイズレベルを表示している。領域ではノイズは周波
数の増加に伴って減少し、領域では周波数にかかわら
ず一定レベルにある。主に領域のノイズは送信部１側
から分配される送信信号により生じ、その信号レベルで
増減する。領域のノイズは、受信部２側の熱雑音によ
り生じ、受信ゲインの大きさで増減する。FIG. 2 is a diagram for explaining the relationship between the noise level and the frequency domain. The horizontal axis indicates frequency, and the vertical axis indicates noise level. In the region, the noise decreases as the frequency increases, and in the region, the noise is at a constant level regardless of the frequency. The noise in the region mainly occurs due to the transmission signal distributed from the transmission unit 1 side, and increases or decreases at the signal level. The noise in the region is generated by thermal noise on the receiving unit 2 side, and increases or decreases according to the magnitude of the reception gain.
【００２１】したがって、送信部１側の回路が障害であ
ると領域のノイズが低下する。一方、受信部側の回路
が障害であると領域のノイズが低下する。本発明はか
かる事象の発見に基づくものである。なお、システムに
より異なってくるが、領域と領域の境界周波数は、
〜数ＭＨｚのオーダーである。Therefore, if the circuit on the transmitting section 1 side is faulty, the noise in the area is reduced. On the other hand, if the circuit on the receiving unit side is faulty, the noise in the area decreases. The present invention is based on the discovery of such an event. In addition, although it depends on the system, the boundary frequency between regions is
It is on the order of several MHz.
【００２２】図３は、ＦＭ−ＣＷレーダ装置において、
かかる事象を用いた本発明の一実施例の高周波部の回路
構成である。FIG. 3 shows an FM-CW radar device.
5 is a circuit configuration of a high-frequency unit according to an embodiment of the present invention using such an event.
【００２３】図１に説明したＦＭ−ＣＷレーダ装置の高
周波部において、送信部１と受信部２の構成はほぼ同様
であるが、図３において受信部２にハイブリッド回路２
３を有している点が異なる。In the high frequency section of the FM-CW radar apparatus described with reference to FIG. 1, the configurations of the transmitting section 1 and the receiving section 2 are almost the same, but in FIG.
3 is different.
【００２４】ハイブリッド回路２３は、分周器２２の出
力であるＩＦ出力信号の一部を分岐し、ローパスフィル
タ６とバンドパスフィルタ９に入力する。ローパスフィ
ルタ６は、図２に示した周波数領域の成分を通過させ
るフィルタ特性を有している。一方、バンドパスフィル
タ９は、図２に示した周波数領域の所定周波数帯域成
分を通過させるフィルタ特性を有している。The hybrid circuit 23 branches a part of the IF output signal output from the frequency divider 22 and inputs it to the low-pass filter 6 and the band-pass filter 9. The low-pass filter 6 has a filter characteristic that passes the frequency domain components shown in FIG. On the other hand, the bandpass filter 9 has a filter characteristic of passing a predetermined frequency band component in the frequency domain shown in FIG.
【００２５】ここで、ローパスフィルタ６の出力から検
波器７で直流レベルが抽出される。同様に、バンドパス
フィルタ９の出力は検波器１０に導かれ直流レベルが抽
出される。Here, the DC level is extracted from the output of the low-pass filter 6 by the detector 7. Similarly, the output of the band pass filter 9 is guided to the detector 10 and the DC level is extracted.
【００２６】先に説明したように、領域のノイズ成分
は、送信部１側の電力レベルにより増減し、領域のノ
イズ成分は、受信部２側のゲインにより増減するもので
ある。したがって、送信部１側に障害がある場合は、ロ
ーパスフィルタ６の出力は小さくなる、あるいは遮断さ
れることになる。図４はかかる様子を示す図である。送
信部１の故障により領域のノイズレベルが正常値ＮＭ
から故障時のレベルＡＢに減じている。As described above, the noise component of the area increases and decreases according to the power level of the transmitting unit 1, and the noise component of the area increases and decreases according to the gain of the receiving unit 2. Therefore, when there is a failure in the transmitting unit 1, the output of the low-pass filter 6 is reduced or cut off. FIG. 4 is a diagram showing such a situation. The noise level of the area becomes a normal value NM due to the failure of the transmission unit 1.
From the level AB at the time of failure.
【００２７】一方、受信部２に故障がある場合は、バン
ドパスフィルタ６の出力は小さくなる、あるいは遮断さ
れることになる。図５はかかる様子を示す図である。受
信部２の故障により領域のノイズレベルが正常値ＮＭ
から故障時のレベルＡＢに減じている。On the other hand, when there is a failure in the receiving unit 2, the output of the band-pass filter 6 is reduced or cut off. FIG. 5 is a diagram showing such a situation. The noise level in the area becomes a normal value NM due to the failure of the receiver 2.
From the level AB at the time of failure.
【００２８】図３に戻り説明すると、検波器７は、ロー
パスフィルタ６の出力を直流成分に変換する。検波器１
０は、バンドパスフィルタ９の出力を直流成分に変換す
る。Returning to FIG. 3, the detector 7 converts the output of the low-pass filter 6 into a DC component. Detector 1
0 converts the output of the bandpass filter 9 into a DC component.
【００２９】さらに、比較器８は、所定基準値と検波器
７の出力を比較し、検波器７の出力が所定基準値を下回
る時、アラーム信号を出力する。一方、比較器１１は、
所定基準値と検波器１０の出力を比較し、検波器１０の
出力が所定基準値を下回る時、アラーム信号を出力す
る。Further, the comparator 8 compares the output of the detector 7 with a predetermined reference value, and outputs an alarm signal when the output of the detector 7 falls below the predetermined reference value. On the other hand, the comparator 11
The output of the detector 10 is compared with a predetermined reference value, and when the output of the detector 10 falls below the predetermined reference value, an alarm signal is output.
【００３０】このようにして、比較器８からのアラーム
信号によりＦＭ−ＣＷレーダ装置の送信部１の故障であ
ることを検知することが出来る。また、比較器１１から
のアラーム信号によりＦＭ−ＣＷレーダ装置の受信部２
の故障であることを検知することが出来る。In this way, it is possible to detect from the alarm signal from the comparator 8 that the transmission unit 1 of the FM-CW radar device has failed. Further, the receiving unit 2 of the FM-CW radar device receives an alarm signal from the comparator 11.
Can be detected.
【００３１】なお、上記図３の実施例は、送信部１のノ
イズレベルを所定の基準値と比較する第１の比較器８
と、受信部２のノイズレベルを所定の基準値と比較する
第２の比較器１１とを有しているが、比較器８と比較器
１１を共通にすることも可能である。In the embodiment shown in FIG. 3, the first comparator 8 compares the noise level of the transmitting section 1 with a predetermined reference value.
And a second comparator 11 for comparing the noise level of the receiving section 2 with a predetermined reference value. However, the comparator 8 and the comparator 11 can be shared.
【００３２】すなわち、一つの比較器を有し、且つ所定
の基準値の設定を可変とし、検波器７及び１０の直流レ
ベル出力を切り替えて前記一つの比較器に入力すること
により、送信部１と受信部２の故障を順次切り替えて検
知することが可能である。That is, by having one comparator, setting a predetermined reference value to be variable, and switching the DC level outputs of the detectors 7 and 10 and inputting them to the one comparator, the transmitting unit 1 And the failure of the receiving unit 2 can be sequentially switched and detected.
【００３３】[0033]
【発明の効果】上記したように、本発明はＦＭ−ＣＷレ
ーダ装置において、高周波回路が故障した場合、ノイズ
レベルが大きく変化する。このノイズレベルの変化の状
態を正常時のノイズレベルと比較することにより回路の
障害を検知することが可能である。したがって、本発明
により、簡単な構成で送受信部における障害監視を行う
ＦＭ−ＣＷレーダ装置が提供される。As described above, according to the present invention, in the FM-CW radar device, when the high-frequency circuit fails, the noise level changes greatly. By comparing the state of the change in the noise level with the normal noise level, it is possible to detect a failure in the circuit. Therefore, according to the present invention, an FM-CW radar apparatus that monitors a failure in a transmission / reception unit with a simple configuration is provided.
【００３４】なお、上記説明された実施の形態は、本発
明の理解のためのものであって、本発明はこれに限定さ
れるものではない。本発明の保護の範囲は、特許請求の
範囲の記載に基づき、特許請求の範囲と均等の範囲にあ
るものも本発明の保護の範囲に含まれるものである。The embodiments described above are for understanding the present invention, and the present invention is not limited thereto. The scope of protection of the present invention is based on the description of the appended claims, and those within the scope equivalent to the scope of the claims are also included in the scope of protection of the present invention.
【図１】ＦＭ−ＣＷレーダ装置の高周波部の概念構成を
示す図である。FIG. 1 is a diagram showing a conceptual configuration of a high frequency unit of an FM-CW radar device.
【図２】ノイズレベルと周波数領域の関係を説明する図
である。FIG. 2 is a diagram illustrating a relationship between a noise level and a frequency domain.
【図３】ＦＭ−ＣＷレーダ装置において、図２の事象を
用いた本発明の一実施例の回路構成である。FIG. 3 is a circuit configuration of an embodiment of the present invention using the events of FIG. 2 in the FM-CW radar device.
【図４】送信部１の障害によりノイズレベルが低下する
ことを説明する図である。FIG. 4 is a diagram illustrating that a noise level is reduced due to a failure of the transmission unit 1;
【図５】受信部２の障害によりノイズレベルが低下する
ことを説明する図である。FIG. 5 is a diagram illustrating that a noise level is reduced due to a failure of the receiving unit 2.
１ 送信部 １０ 変調器 １１ 逓倍器 １２ 分波器 ２ 受信部 ２０ 増幅器 ２１ 混合器 ２２ 分周器 ３ 変調信号 ４ 電力増幅器 ５ 前置増幅器 DESCRIPTION OF SYMBOLS 1 Transmitting part 10 Modulator 11 Multiplier 12 Demultiplexer 2 Receiving part 20 Amplifier 21 Mixer 22 Divider 3 Modulation signal 4 Power amplifier 5 Preamplifier
───────────────────────────────────────────────────── フロントページの続き (72)発明者 元二 直樹 兵庫県神戸市兵庫区御所通１丁目２番28号 富士通テン株式会社内 Ｆターム(参考） 5J070 AB19 AC02 AE01 AF03 AH14 AH39 AH40 AK32 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Naoki Motoji 1-2-28 Goshodori, Hyogo-ku, Kobe-shi, Hyogo F-term in Fujitsu Ten Limited (Reference) 5J070 AB19 AC02 AE01 AF03 AH14 AH39 AH40 AK32
Claims (5)
回路と、 該ノイズレベルを抽出する回路の出力を所定基準値と比
較する比較回路を有し、 該比較回路が、前記ノイズレベルを抽出する回路の出力
が前記所定基準値より小さくなることを検出したアラー
ム信号を出力するように構成されたことを特徴とするＦ
Ｍ−ＣＷレーダ装置。1. A circuit for extracting a noise level in a high-frequency section, and a comparison circuit for comparing an output of the circuit for extracting the noise level with a predetermined reference value, wherein the comparison circuit extracts the noise level F is configured to output an alarm signal which detects that the output of the second signal becomes smaller than the predetermined reference value.
M-CW radar device.
ける送信側のノイズレベルを抽出する第１の回路と、前
記高周波部における受信側のノイズレベルを抽出する第
２の回路とを有し、 前記比較器は、前記第１の回路の出力と所定の第１の基
準値と比較する第１の比較回路と、前記第２の回路の出
力と所定の第２の基準値と比較する第２の比較回路とを
有することを特徴とするＦＭ−ＣＷレーダ装置。2. The circuit according to claim 1, wherein the circuit for extracting the noise level includes a first circuit for extracting a noise level on a transmission side in the high-frequency section and a second circuit for extracting a noise level on a reception side in the high-frequency section. A first comparison circuit that compares an output of the first circuit with a predetermined first reference value; and a comparator that compares an output of the second circuit with a predetermined second reference value. And a second comparison circuit for comparing with the reference value of (1).
ける送信側のノイズレベルを抽出する第１の回路と、前
記高周波部における受信側のノイズレベルを抽出する第
２の回路とを有し、 前記比較器は、前記第１の回路の出力と前記第２の回路
の出力とを切り替えて入力し、対応する所定の第１の基
準値又は、第２の基準値と比較することを特徴とするＦ
Ｍ−ＣＷレーダ装置。3. The circuit according to claim 1, wherein the circuit for extracting the noise level includes a first circuit for extracting a noise level on a transmitting side in the high frequency section and a second circuit for extracting a noise level on a receiving side in the high frequency section. And the comparator is configured to switch and input between the output of the first circuit and the output of the second circuit, and to output a corresponding predetermined first reference value or a second reference value. F
M-CW radar device.
波数に対応してノイズレベルが変化する第１の周波数帯
域の信号を通過するローパスフィルタであり、 前記受信側のノイズレベルを抽出する第２の回路は、所
定の帯域においてノイズレベルが変化しない第２の周波
数帯域の信号を通過させるバンドパスフィルタであるこ
とを特徴とするＦＭ−ＣＷレーダ装置。4. The transmission circuit according to claim 2, wherein the first circuit for extracting the noise level on the transmission side passes a signal in a first frequency band in which the noise level changes according to the frequency. A second circuit for extracting a noise level on the receiving side, wherein the second circuit is a band-pass filter for passing a signal in a second frequency band in which a noise level does not change in a predetermined band. -CW radar equipment.
は、高い周波数側にあることを特徴とするＦＭ−ＣＷレ
ーダ装置。5. The FM-CW radar device according to claim 4, wherein the second frequency band is on a higher frequency side with respect to the first frequency band.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000129768A JP4390359B2 (en) | 2000-04-28 | 2000-04-28 | FM-CW radar equipment |
| US09/754,776 US6429807B2 (en) | 2000-04-28 | 2001-01-04 | FM-CW radar equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000129768A JP4390359B2 (en) | 2000-04-28 | 2000-04-28 | FM-CW radar equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001311772A true JP2001311772A (en) | 2001-11-09 |
| JP4390359B2 JP4390359B2 (en) | 2009-12-24 |
Family
ID=18638990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000129768A Expired - Fee Related JP4390359B2 (en) | 2000-04-28 | 2000-04-28 | FM-CW radar equipment |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US6429807B2 (en) |
| JP (1) | JP4390359B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004132832A (en) * | 2002-10-10 | 2004-04-30 | Honda Motor Co Ltd | Controller of distance between vehicles |
| JP2006234612A (en) * | 2005-02-25 | 2006-09-07 | Fujitsu Ltd | Device, method, and program for measuring abnormality of electro-magnetic interference measurement system and recording medium recorded with program |
| JP2006275776A (en) * | 2005-03-29 | 2006-10-12 | Mitsubishi Electric Corp | Millimeter-wave radar module |
| JP2014145709A (en) * | 2013-01-30 | 2014-08-14 | Furukawa Electric Co Ltd:The | Pulse radar device |
| US9882573B2 (en) | 2013-06-28 | 2018-01-30 | Denso Corporation | Method of fabricating electronic device and limit value setting apparatus |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3893912B2 (en) * | 2001-07-18 | 2007-03-14 | 株式会社日立製作所 | Vehicle control device |
| JP3711952B2 (en) * | 2002-03-12 | 2005-11-02 | 三菱電機株式会社 | Doppler radar equipment |
| DE10225152A1 (en) * | 2002-06-06 | 2003-12-18 | Bosch Gmbh Robert | Driver device for a microwave oscillator |
| JP4747652B2 (en) * | 2005-04-15 | 2011-08-17 | 株式会社デンソー | FMCW radar |
| JP4544304B2 (en) * | 2005-05-16 | 2010-09-15 | 株式会社村田製作所 | Radar |
| DE102009027368A1 (en) * | 2009-07-01 | 2011-01-05 | Robert Bosch Gmbh | mixer monitoring |
| US10670699B2 (en) * | 2017-09-07 | 2020-06-02 | Nxp B.V. | RF radar device BIST using noise injection |
| US10097287B1 (en) * | 2017-09-07 | 2018-10-09 | Nxp B.V. | RF radar device BIST using secondary modulation |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1344677A (en) * | 1971-10-05 | 1974-01-23 | Granley Products London Ltd | Testing device |
| US3932870A (en) * | 1974-05-31 | 1976-01-13 | American District Telegraph Company | On-line test circuit for intrusion alarm systems |
| JPS5437495A (en) * | 1977-08-29 | 1979-03-19 | Nissan Motor | Radar diagnosing device |
| US4138678A (en) * | 1977-08-31 | 1979-02-06 | The Bendix Corporation | Integrity monitoring system for an aircraft navigation system |
| US4739351A (en) * | 1986-11-18 | 1988-04-19 | Hazeltine Corporation | Verification of on-line fault monitor performance |
| JP3197346B2 (en) | 1992-08-04 | 2001-08-13 | 富士通株式会社 | Automobile anti-collision radar with malfunction detection function |
| US5287111A (en) * | 1992-08-24 | 1994-02-15 | Shmuel Hershkovitz | Doppler shift motion detector with variable power |
| US5254998A (en) * | 1992-11-02 | 1993-10-19 | Allied-Signal Inc. | Executive monitor for microwave landing system |
| JP3260948B2 (en) | 1993-12-29 | 2002-02-25 | 富士通テン株式会社 | Radar device with self-diagnosis function and planar antenna |
| JPH08184666A (en) | 1994-12-27 | 1996-07-16 | Omron Corp | Radar distance measuring equipment |
| JP3884130B2 (en) | 1997-08-08 | 2007-02-21 | 富士通株式会社 | FM-CW radar equipment |
| JP3488610B2 (en) | 1997-12-03 | 2004-01-19 | 富士通テン株式会社 | Radar equipment |
-
2000
- 2000-04-28 JP JP2000129768A patent/JP4390359B2/en not_active Expired - Fee Related
-
2001
- 2001-01-04 US US09/754,776 patent/US6429807B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004132832A (en) * | 2002-10-10 | 2004-04-30 | Honda Motor Co Ltd | Controller of distance between vehicles |
| JP2006234612A (en) * | 2005-02-25 | 2006-09-07 | Fujitsu Ltd | Device, method, and program for measuring abnormality of electro-magnetic interference measurement system and recording medium recorded with program |
| JP2006275776A (en) * | 2005-03-29 | 2006-10-12 | Mitsubishi Electric Corp | Millimeter-wave radar module |
| JP2014145709A (en) * | 2013-01-30 | 2014-08-14 | Furukawa Electric Co Ltd:The | Pulse radar device |
| US9882573B2 (en) | 2013-06-28 | 2018-01-30 | Denso Corporation | Method of fabricating electronic device and limit value setting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| US20010035839A1 (en) | 2001-11-01 |
| US6429807B2 (en) | 2002-08-06 |
| JP4390359B2 (en) | 2009-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0825455B1 (en) | Failure determination device of radar apparatus | |
| JP4390359B2 (en) | FM-CW radar equipment | |
| US20240094371A1 (en) | Radar device, method of detecting failure of radar device, and method of operating radar device | |
| CN109477890B (en) | Fault detection in radar systems | |
| US7532156B2 (en) | Radar apparatus | |
| JP2003329768A (en) | Radar apparatus | |
| EP2765440B1 (en) | Moving body detector | |
| NL9001414A (en) | RADAR DEVICE WITH FAULT INDICATOR AND RECEIVER WITH FAULT INDICATOR. | |
| US4194205A (en) | R.F. Power and video modulation monitoring circuit for countermeasures system | |
| US20070279102A1 (en) | Detector device | |
| JP3565638B2 (en) | FM-CW radar failure detection device | |
| JP2004171402A (en) | Signal processor with fault diagnostic function | |
| JP3884130B2 (en) | FM-CW radar equipment | |
| JP2003121541A (en) | On-vehicle radar apparatus | |
| JPH11271431A (en) | Fmcw radar apparatus | |
| JP2974639B2 (en) | Radio wave sensor that detects a very close target | |
| KR102026262B1 (en) | Ladar sensor system and sensing method thereof | |
| JP2000147087A (en) | Gain control device and method for millimeter-wave radar | |
| KR20230027516A (en) | Radar capable of Self-diagnosis and Disturbance objects detection using Proximity feedback signal and Operation method thereof | |
| JP2001021636A (en) | Receiver for positioning system | |
| JPH07177074A (en) | Diversity reception equipment for spread spectrum communication | |
| JPH07159524A (en) | Cw doppler measuring radar | |
| JPH11160415A (en) | Radar apparatus | |
| JPH0376055B2 (en) | ||
| JPS62137926A (en) | Space diversity alarm circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20060728 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080711 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080715 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080916 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090203 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090402 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20091006 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20091006 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121016 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121016 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131016 Year of fee payment: 4 |
|
| LAPS | Cancellation because of no payment of annual fees |